Originally Posted by
Judd
Better still, direct him to keep his hand on the control wheel during a coupled approach and autoland and tell him to emulate that in future.
In my experience, the 737 autopilot itself is quite a high-gain controller, stirring the pot all over the place in comparison to the 777 I flew before. Of course that's partly due to its much lower mass (hence inertia), but I think it's also just a characteristic of its control system.
During my first 737 approach in turbulent and windy weather conditions I actually decided to disconnect the AP earlier than I had planned, believing that the rapid fluctuating control inputs were signs of some control system malfunction. I later learned that these kind of control inputs are normal system behaviour for the 737 autopilot.